- #71
Lord Jestocost
Gold Member
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I completely agree with @vanhees71 point of view in comment #70. On ‘mathpages.com’ one reads, for example, the following:
“People sometimes think that the lack of separability implies ‘action at a distance’, but that's a misunderstanding. Everyone agrees that quantum mechanics does not entail any action at a distance, because no information or energy propagates faster than light. Nevertheless, the entangled parts of a quantum system are not separable, and this is precisely what the violations of Bell's inequality demonstrate. It’s true that in the classical context the only way things could not be separable would be by action at a distance, but the peculiar feature of quantum mechanics is that things can be non-separable without implying any action at a distance. The non-separability is subtle, but it represents a profoundly non-classical aspect of the world.”
Entry: “Quantum Mechanics and Separability” (https://www.mathpages.com/home/kmath731/kmath731.htm)
“People sometimes think that the lack of separability implies ‘action at a distance’, but that's a misunderstanding. Everyone agrees that quantum mechanics does not entail any action at a distance, because no information or energy propagates faster than light. Nevertheless, the entangled parts of a quantum system are not separable, and this is precisely what the violations of Bell's inequality demonstrate. It’s true that in the classical context the only way things could not be separable would be by action at a distance, but the peculiar feature of quantum mechanics is that things can be non-separable without implying any action at a distance. The non-separability is subtle, but it represents a profoundly non-classical aspect of the world.”
Entry: “Quantum Mechanics and Separability” (https://www.mathpages.com/home/kmath731/kmath731.htm)